from flask import current_app, jsonify
from flask import render_template
from flask import request
from flask import session

from info import constants
from info.models import User, News, Category
from info.utils.response_code import RET
from  . import  index_blu
from  info import  redis_store

@index_blu.route('/news_list')
def news__list():
    """
    获取首页新闻数据
    :return:
    """

    # 1.获取参数
    # 新闻的分类id
    cid = request.args.get("cid","1")
    page = request.args.get("page",'1')
    per_page = request.args.get("per_page","10")

    # 2.校验参数
    try:
        page = int(page)
        cid = int(cid)
        per_page = int(per_page)
    except Exception as e :
        current_app.logger.error(e)
        return  jsonify(errno = RET.PARAMERR,errmsg="参数")

    filters = [ News.status == 0]
    if  cid  != 1:    # 查询的不是最新的数据
        # 需要添加条件
        filters.append(News.category_id == cid)

     # 3.查询数据
    try:
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page, per_page, False)
    except Exception as e :
        current_app.logger.error(e)
        return  jsonify(errno = RET.DBERR,errmsg = "数据查询错误")


    # 取到当前页的数据
    news_model_list = paginate.items  # 模型对象列表
    total_page = paginate.pages
    current_page = paginate.page

    news_dict_li = []

    for news in  news_model_list:

        news_dict_li.append(news.to_basic_dict())

    data = {
        "total_page" : total_page,
        "current_page": current_page,
        "news_dict_li" :news_dict_li
    }
    # print(data)

    return  jsonify(errno = RET.OK,errmsg = "ok",data = data)





@index_blu.route('/')
def index():
    """
    # 显示首页
    1.如果用户已经登陆,将当前登陆的用户的数据传到模板中,供模板显示
    :return:
    """
    # 显示用户是否登陆的逻辑
    # 取到用户的id
    user_id = session.get("user_id",None)
    user = None
    if user_id:
        try:
            user = User.query.get(user_id)
        except Exception as e :
            current_app.logger.error(e)


    # 右侧的新闻排行的逻辑
    news_list = []
    try:
         news_list= News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e :
        current_app.logger.error(e)

      # 定义一个空的字典列表,里面装的是字典
    news_dict_li = []
    # 遍历对象列表.将对象的字典添加到字典列表中
    for news  in news_list:
        news_dict_li.append(news.to_basic_dict())

     # 查询分类数据 ,通过模板的形式渲染出来
    categories=Category.query.all()

    category_li = []
    for category in categories:
        category_li.append(category.to_dict())




    data = {
        "user":user.to_dict() if user else  None,
        "news_dict_li": news_dict_li,
        "category_li" : category_li

    }
    # print(data)
    return  render_template('news/index.html',data = data)


@index_blu.route('/favicon.ico')
def  favicon():
    return  current_app.send_static_file('news/favicon.ico')





#
